Guides

Drop-in payment button

The simplest possible checkout: an HTML form on your page POSTs to your server, your server creates the Trevi payment, then redirects the customer to the hosted payment URL.

Never call POST /pay/create directly from the browser — your API key would be exposed. Always proxy through your own server-side handler.

After the customer pays, Trevi redirects them to redirect_url (passed at create time) and POSTs the final state to callback_url. Use the callback to flip your order state; the redirect is just UX.